NoSQL databases are also known as as non-SQL databases. They are different than relational (SQL) databases and do not feature the SQL model with rows and tables. The following types of NoSQL databases are available.
- Key-value
- Document
- Columnar
- Graph
Examples of NoSQL databases are the following:
- Azure Cosmos DB (various type coverage)
- Azure Table storage and API (key-value)
- MongoDB (document)
- Apache Cassandra (columnar)
- Apache Tinkerpop and Gremlin query language (graph)